6 3/4
I replaced the front door speakers in my 99 Concorde because they had blown. They are 6 1/2". I bought mine from best buy.
4X6 speakers
6" speakers in a 2000 Toyota camery
The front door speakers on a 2000 Pontiac Grand Am Se are 4x6. The rear deck speakers are 6x9.
The front speakers are 5 1/4"
The size of the door speakers are 5.25. I have just moments ago replaced mine. This is the dimension of the Concorde is the infinity system.
4x 6
6.5in
6 * 8 or smaller there are few speakers in this size. 6 * 9 will not fit.
5.25
6.5 in the front. 6X9 in the rear.
In 2000, the front door speakers are 6x8 (though 5x7 fits just fine). The rear deck speakers are usually the same size as the front door speakers, but some had 6x9. It's best the measure the opening before buying new speakers for the back.